#include <bits/stdc++.h>

using namespace std;

int main(){
    int n;
    cin >> n;
    vector<int> calories(n);
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> calories[calories_i];
    } 
    long long ans=0;
    sort(calories.rbegin(),calories.rend());
    for(int i=0;i<calories.size();i++)
        {
        
        ans=ans+(calories[i]*(long long)pow(2,i));
    }
    cout<<ans<<endl;
    // your code goes here
    return 0;
}